Stuffing box



July 7,. 1931. v f w, McKlsslCK 1,813,308

STUFFING Box l Filed Jan. 25, 1929 35 At the intersection of the neck and body a sleeve 16. The dished upper end of the cup *8L* rammed July 1,1931 t i 1,813,308

UNITED STATES PATENT f OFFICEA i WILLIAM VH. MCIISSIC'K, 'OIEVLULSA7 OKLIlI-IOlVIA` -v i i 'i srurriivo ioX y y Application filed. January 25, 1929. Serial No..334,923. This invention relates to new and useful space v`2O above said partition. The partiimprovements in stuffing boXes. tion has a centralopening 21 registering with One object of the invention is to provide Y asimilar opening 22 in the top of the cap for a stufling box for use with polish rods for receiving the polish rod.

G pumping wells and including certain im- Aninverted packing cup or cage 23 sur- 55 provements, whereby a more efficient and rounds the polish rod and bears against the economical box is had. underside of the partition 19.. The cup has A particular object of the invention is to an opening 24 through'whieh the rod `passes provide a floating packing arranged to shift and this opening is smaller than thevopenings y l@ laterally with the rod and produce at all 21 and 22. All of the openings 14, 21, 22 and 6G times a fluid-tight joint. 24 are larger than the diameter' of the rodk A further object of the invention is to pro- 15, Vthus permitting a free y reciprocation 0f vide a floating packing of a simple nature, said rod without binding in said openings. whereby a top packing ring is eliminated and `The upper end of the cup 23 is dished and i l5 the packing container contacts direct with a plurality of'packing washers or disks 25 i3 the transverse partition of the boX head, are fitted in the cup. The uppermost washer thus reducing the number of parts. engages the dished end of said cup. These Further reference will be made herein to packing washers may be made of leather, asv the foregoing and other features of the inbestos or any other material suitable forthe d D vention, which will be more particularly purpose or a ysingle coil of'packing may be 70 pointe-d out. used instead ofwashers. Y- In the following specification an eXem- A metallic washer 26 isiitted into the botplifieation of the invention is set forth and toni of the cup so as to rest upon the follower this is illustrated in the accompanying drawsleeve 16 and support the packing washers. A ings, in which: While this washer 26 may be omitted it will, Fig. 1 is a vertical sectional view of a when used, save the lowermost packing stuiiing box constructed in accordance with washer from wear by contact with tlie sleeve. the invention, and The packing washers fit snugly on the Y Fig. 2 is a horizontal cross-sectional view polish rod so asv to strip the same of oil and 30 taken on the line 2-2 of Fig. 1. grease and prevent the upward passage of S0 y In the drawings the numeral 10' designates `fluids and gases. Vhenthe cap 17 is screwed a box housing or bodywhich has a reduced down the partition 19 will force the cup 23 neck 11 internally screw-threaded at 12 to downwardly, whereby the packing washers screw on thetubing or oil conducting pipe. will be forced upward in said cup by they transverse partition 13 is formed integral will cause a compression of the washers 25. with the structure. i Owing to the enlarged openings 14, 21 and The partition 13 has a central opening 14V 22 the rod may move laterally and the for receiving the polish rod 15.y A concentric washer 26 slide on the rounded upper end of follower sleeve 16 rises from thepartition 13 the sleeve 16. By this arrangement the rod and surrounds the opening 14. This sleeve is permitted a free movement. The packing t preferably terminates Vbelow the upper edge cup is full floating and owing to the snug fit of the body and has its upperedge rounded. of the packing lwashers on the polish rod A cap or head 17 vhas an internal annular will move laterally with said rod, thus at all boss 18 at its lower end which is serewtimes assuring a v`fluid-tight joint. By this threaded to engage the threads of the body arrangement only one set of paekings is rewhereby the latter is telescoped into the cap quired and the whole structure is greatly when the latter'is rotated in a clockwise disimplified. reetion. The cap has a transverse partition Various changes in the size and shape of 19 in its upper portion and a chamber or the different parts, as well as modificationsy and alterations, may be made Within the scope of the appended claims.

Vhat I claim, is:

1. In a stufiing boX for polish rods, a body, a. cap adjustably mounted upon said body and having a partition, a` polish rod passing through the body and cap and movable laterally thereof, a follower sleeve rigidly mounted in the body spaced from the polish rod and having its upper edge rounded, an inverted packing cup surrounding the polish rod and contacting With the cap at its upper end, the upper end of the sleeve telescoping into the cup, and a packing' element Within the cup compressed by the sleeve and snugly engaging the polish rod, the cup and packing being movable laterally with the rod in cont-act with said partition and supported by the rounded edge of said sleeve.

2. In a stniing box for polish rods, the combination with a vertical polish rod, of a body, a cap adjustably mounted on the body, the body and cap having enlarged openings receiving the rod and 1Jermitting lateral movement thereof therein, an upright follower sleeve surrounding the rod and integral With the body, and spaced from both the rod and body, the cap having a transverse partition, an inverted packing cup surrounding the rod and overhanging the sleeve in the space intermediate the body, the upper end of the cup bearing against the partit-ion, a packing medium Within the cup embracing the rod and supported to slide upon the free end of the sleeve, and a Wear washer Within the cup interposed between the upper end of the sleeve and the packing medium.

In testimony whereof I affix my signature.

WILLIAM H. MCKISSICK. 

